Wireless Earbuds
True wireless headphones refer to Bluetooth earbuds or IEMs that have neither cords or wires between them nor to an audio source (smartphones, MP3 players, tablet, etc.). Since they have no wires, the mic, controls and battery are built into the housing of the earbuds.Wireless earbuds are great for exercising or listening to music without those pesky cables connecting each earbud. They're ideal for people who need to move about and don't want any cables at all. The drawback is battery life and fit.
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How to apply NB-IOT technology on smart bracelet?
As we stand at the forefront of the Internet of Things industry, it’s hard to ignore the significance of NB-IoT. Since its standard was established in 2016, many have predicted that this year would mark the beginning of its commercialization. From what we see today, major players in IoT applications are certainly paying attention to NB-IoT technology.
One key point to note is that NB-IoT relies on operators for unified network deployment and coverage via their base stations. In the near future, China’s NB-IoT network will be managed by the three primary telecom operators, with China Telecom currently leading the way in terms of network speed. Naturally, this raises questions about how network charges will work. After all, any application of NB-IoT technology requires a SIM card, which brings along additional costs. Whether you’re a consumer, manufacturer, or operator, this is something to consider.
Someone once asked whether NB-IoT has lower radiation compared to SIM card communication. Here's the thing—NB-IoT itself is a type of SIM card-based technology. In terms of radiation levels, all current wireless communication technologies emit negligible amounts of radiation for humans. So, this concern is somewhat misplaced.
What people are really concerned about when it comes to NB-IoT is power consumption. Lower power consumption directly affects battery life and how often users need to charge their devices. Compared to previous 2G GPRS modules, NB-IoT consumes roughly ten times less power (GPRS sleep current ≤ 50uA vs. NB-IoT module power consumption ≤ 5uA). While this is impressive, it’s still higher than BLE (Bluetooth Low Energy).
Right now, most smart wearable products rely more on BLE due to its lower power needs. Thus, given the same battery capacity, NB-IoT-powered devices will likely be fewer in number than those using BLE.
Another limitation of NB-IoT is its relatively low communication rate, making it unsuitable for applications requiring large data transfers. Additionally, the combination of low power consumption and low rates means NB-IoT isn’t ideal for applications demanding frequent real-time data uploads.
Looking ahead, the cost of NB-IoT modules should decrease as the market grows. Currently, operators are offering subsidies, which helps reduce initial costs.
On the positive side, NB-IoT can solve issues BLE faces when it comes to needing a mobile terminal. Unlike BLE, NB-IoT operates as an independent upload terminal. This means smart wearables can function without relying on a smartphone and consume less power than traditional 2G networks.
However, NB-IoT modules cannot yet provide location services, though base station-based positioning might become available in the future. Additionally, the current protocol version supports intelligent active timing reports but doesn’t yet allow for downward copying.
In terms of physical size, NB-IoT modules on the market are generally larger than desired. Pricing remains another challenge.
To summarize, if you're evaluating NB-IoT for smart bracelets or watches, consider scenarios where upload frequency isn't extremely high, real-time performance isn’t critical, and some applications can operate independently of a mobile phone. Also, if users encounter pairing difficulties with Bluetooth or Wi-Fi (like older generations), NB-IoT could be a solid solution.
Today, there are already several NB-IoT-based smart wearable products on the market. These are forward-thinking innovations, but widespread adoption still depends on complete network coverage. At the heart of smart wearables lies the understanding of user needs and pain points. NB-IoT and other LPWAN technologies are just tools; creativity is the true essence.
This document is organized based on insights from "Knowing."